1/2a-1/2=-5

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Solution for 1/2a-1/2=-5 equation: 


a in (-oo:+oo)

(1/2)*a-(1/2) = -5 // + 5

(1/2)*a-(1/2)+5 = 0

(1/2)*a-1/2+5 = 0

1/2*a+9/2 = 0 // - 9/2

1/2*a = -9/2 // : 1/2

a = -9/2/1/2

a = -9

a = -9

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